Serial connections to printers usually require an exacting connection from some pins to the pins on the printer.
In today's world of buyers I think you should not buy a serial printer unless you know what and how serial ports work. It's just too rough on folk today. Yes, you can get help but the costs usually are more than the printer.
Then again you didn't write that you set which COM port was to be used in the driver or other controls. Again, this only proves that these printers are to be avoided.
I am trying to connect an Epson tm-t90 receipt printer to my laptop running xp, the printer is conncted via a serial cable 8 pin on pc and 25 pin on printer, i have installed the driver, printer shows under the printer section but is unavailable. When I send print test from pc nothing happens.